Help needed on my sheridan 397PA that has a frozen pump

[Fishfreak]

Hi Guys.   I have a sheridan 397PA that has a frozen pump and I can't seem to find ANY info on it.   The pump opens fine but then it won't close.   It's so hard to close, I slightly bent the arm going to the piston.   It's like there is a mecahnical jam.  Weird.   I don't think it's "Air locked" because I never pump over 10x and it has fired recently.  I haven't oiled it because it says right on the gun not to oil in the intake.  I did put a little bit on the silver thingy that the pivot arm is attached to, but that didn't help  Any advice is appreciated!

[Back_Roads]

 Might be a stuck intake valve, oil can be used on the outside of the pump cup area, a few drops, keeps everything lubed just enough.

[Vintage Streak]

Might be a stuck intake valve, oil can be used on the outside of the pump cup area, a few drops, keeps everything lubed just enough.

  I also did that but I also put some hydraulic tool oil where the pellet goes. Let it sit awhile then fired it with the bolt open maybe not a good idea but it worked.

[bantam5s]

Hi Guys.   I have a sheridan 397PA that has a frozen pump and I can't seem to find ANY info on it.   The pump opens fine but then it won't close.   It's so hard to close, I slightly bent the arm going to the piston.   It's like there is a mecahnical jam.  Weird.   I don't think it's "Air locked" because I never pump over 10x and it has fired recently.  I haven't oiled it because it says right on the gun not to oil in the intake.  I did put a little bit on the silver thingy that the pivot arm is attached to, but that didn't help  Any advice is appreciated!

Well they're 8 pump guns, so maybe repeated 10 pump operation took it's tole ?

[Gertrude]

Hi Guys.   I have a sheridan 397PA that has a frozen pump and I can't seem to find ANY info on it.   The pump opens fine but then it won't close.   It's so hard to close, I slightly bent the arm going to the piston.   It's like there is a mecahnical jam.  Weird.   I don't think it's "Air locked" because I never pump over 10x and it has fired recently.  I haven't oiled it because it says right on the gun not to oil in the intake.  I did put a little bit on the silver thingy that the pivot arm is attached to, but that didn't help  Any advice is appreciated!

Since you are in Garden Grove, you are only about 10-12 miles from Mac-1 Airguns in Signal Hill.
 He (Tim) is the generally accepted "Guru" for Benjamin and Sheridan Pumpers.
 He will be able to fix you right up.

Mac-1 Airguns
1886 Freeman Ave, Signal Hill, CA 90755
Ph. 562-961-6221

[Caouane1]

Mac 1- Best advice. Even if he weren't 10 miles away.